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<td style="vertical-align: top;; padding: 0px; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HHH-7610" style="color: #3b73af; text-decoration: none">Re: Option for setting @Embedded field null when all columns are NULL</a> </span>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0; padding-top: 10px"> <span class="diffcontext">This is probably going to be frowned upon by purists, but until there is a way to configure hibernate to ensure @Embedded fields are non-null, I've written an AspectJ to populate the value if null.<br /><br /></span> <span class="diffaddedchars" style="background-color:#ddfade;">This isn't fully tested, and definitely not tested against Collections of embedded objects, so buyer-beware.<br /><br /></span> <span class="diffcontext">{code}<br />public aspect NonNullEmbedded {<br /><br /> // define a pointcut for any getter method of a field with @Embedded of type Validity with any name in com.ia.domain package<br /> pointcut embeddedGetter() : get( @javax.persistence.Embedded * com.company.model..* );<br /> <br /><br /> /**<br /> * Advice to run before any Embedded getter.<br /> * Checks if the field is null. If it is, then it automatically instantiates the Embedded object.<br /> */<br /> Object around() : embeddedGetter(){<br /> Object value = proceed();<br /> <br /> // check if null. If so, then instantiate the object and assign it to the model.<br /> // Otherwise just return the value retrieved.<br /> if( value == null ){<br /> String fieldName = thisJoinPoint.getSignature().getName();<br /> Object obj = thisJoinPoint.getThis();<br /> <br /> // check to see if the obj has the field already defined or is null<br /> try{<br /> Field field = obj.getClass().getDeclaredField(fieldName);<br /> Class clazz = field.getType();<br /> value = clazz.newInstance();<br /> field.setAccessible(true);<br /> field.set(obj, value );<br /> }<br /> catch( NoSuchFieldException | IllegalAccessException | InstantiationException e){<br /> e.printStackTrace();<br /> }<br /> }<br /> <br /> return value;<br /> }<br />}<br /><br />{code}</span>
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